Installation
Before you Install the software
OS Platform and Version Compatibility
The version of the X.25 link software you’re installing must be compatible with the version of
•Disk space required to install: 7 Mb
•Software install with system up or down? Up
•
•Reboot? Yes
Memory
Your X.25 link supports a high number of virtual circuits operating at high baud rates. Since both X.25 and the BSD sockets API may store a certain amount of data for each socket/circuit, HP recommends that you check that your system has enough memory to handle the number of VCs you plan to use. A few guidelines to help you are provided below.
Related Parameters
•Level 3 window size (W in formulas below) as configured in the x25config file
•Level 3 packet size (P in formulas below) as configured in X.25 configuration file
•Socket buffer size (B in formulas below) used in your applications (setsockopt() system call). The default is 4 Kb.
Evaluation Formulas The following formulas can be used to evaluate
X.25 memory requirements:
Memory for each VC (MVC) in bytes:
MVC = (B x 3) + (2 x (W + 1) x P)
Total Memory (TM) for X.25 in bytes:
TM = sum (MVC) + Number of cards x 5120
NOTE | These figures are only for protocol and API requirements. You should |
| also consider the memory required by your applications. |
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Chapter 2 | 25 |